A reserve price is the minimum price the seller will accept. This price is hidden from bidders. To win, a bidder must have the highest bid and have met or exceeded the reserve price.
I constantly am on the lookout for cheap amplifiers that I can modify and improve without too much hassle and expense.
This is one of those type of amplifiers.
The amp is made in CHINA and is a rip-off from numerous well known designs by leading manufacturers.
The problem with this and others, is that they are not very well made and the overall workmanship at best is poor.
With this amplifier I have pulled it apart and fixed the really bad stuff, which is mainly poor soldering and poor workmanship.
I add extra earthing and replace the power supply circuit with my own version, which produces more current.
I do some other modifications to them as well to make them perform better in the Bass Response region. I improve the protection circuit and stabilize the ouput section to perform correctly under loads.
What is important is that the amplifier after inspection and modifications is a reasonable 4 channel amplifier with moderate outputs of 85 watts RMS/channel. The manufacturer states that the maximum output is 4X250watts, which is an improvement on how they rate their product(full explanation given below).
I do not say that this is audiophile quality, but for the asking price, it is GOOD VALUE FOR MONEY, especially after it has been modified.
The amp is located in AUSTRALIA and not in HONG KONG. I inspect, modify and do all the work required. I am a qualified electrical engineer and have been doing this for over 30 years.
If you have a problem, then I will be the one you will be resolving your problem. The warranty on this amplifier is with my company and not with some ASIAN based SELLER who has no idea about electronics. I will not give you the run around like other ebay Sellers.
Finally I sell other amps as well, just look in my store and read what I have to say. Also, read my feedback comments on the amps I sell. Most agree, great value for money.
FEATURES
This amp can be used either as a 4 channel,3 channel or 2 channel amp
The power supply is a PWM(pulse width modulation) MOSFET DC-DC power supply, which now supplies thae correct voltage and current required to produce the rated outputs.
The amp has two separate Frequency divider networks, or Cross-overs as we refer ot them as.
Ch3 and 4 have line outputs, which are non-fader outputs, that can be used to run another amp for your sub-woofers.
The amp is fitted with GOLD plated input and output connectors.
This amp has a three stage protection circuit, which now works correctly
This amp will now deliver 4 x 85 watts RMS per channel at a 4 ohm load.
The total harmonic distortion is only 0.04% at the rated output
The manufacturer quotes 4 x 250 watts maximum output per channel
Each pair of channels have a HPF and LPF that can be turned off and on. This is normally referred to as a cross-over.
Each crossover has a gain control and a variable frequency selector for both HP and LP filters.
Each pair of inputs also have a SUPER BASS control and a TREBLE control that can be switched from 0dB-6dB-12dB
The amp is easy to setup and use.
SPECIFICATIONS
V12 MODEL 705
TRUE 340 watts RMS or 85 watts per channel into 4 ohms
1000watts maximum output
4X250 watts maximum output
In two channel bridged mode the output is 170watts RMS
In two channel bridged mode the output is 500watts Max
In-built Cross-overs
HP and LP filters on each pair of input channels.
Super Bass control for flat-6dB-12dB boost
Treble Boost flat-6dB-12dB
Input ground isolatoion noise rejection circuit
4 channel input operation
4 channel operation which can be bridged to form two Mono channels
De-thump turn-on circuit
Gold plated input connectors and power and speaker connectors
Delay power circuit
Three levels of protection....Thermal overload protection,Overcurrent protection, Output power overload protection and Short circuit protection.
Switch mode FET power supply( no pwr transformer)
Frequency reponse is 20Hz to 20kHz +/- 1dB
Input sensitivity is <200mV
Signal to Noise ratio is 95dB
Channel seperation is >50dB
Speaker impedance for stereo is 2-16 ohms and for a single Mono channel is 4-16 ohms
Requires 12V DC to operate with a Negative ground
Weight is 3.5kg
dimensions are 260x60x340mm
GENERAL COMMENT FROM THE SELLER
In recent times I have noticed a lot of Ebay Sellers mixing and matching specifications for amplifiers and speakers. At the best this can be misleading and at worst it can be fraudulent.
I am referring to the OUTPUT POWER ratings given to speakers and amplifiers.
I will not name the Sellers but will say that they are high volume Sellers who should know better.
The terms I am referring to are, PEAK, MAXIMUM, PMPO, MUSIC and RMS output power ratings.
The only TRUE, RELIABLE, CONSTANT reference rating that ALL professional organizations relate to is the RMS rating.In recent times they have included the MAXIMUM rating as well.
PEAK and PMPO ratings are very misleading and vary constantly from manufacturer to manufacturer. In reality they are very unreliable specifications that do not really indicate the correct output levels of amplifiers and speakers.
A Buyer should always look and ask for the RMS rating, especially when comparing one product against another.
I have also noticed that a lot of manufacturer's do not include the RMS ratings of their product. If you cannot find the RMS rating, then ask the supplier, manufacturer or Seller of the product for this specification. If they do not supply you with the RMS value, then you should consider looking elsewhere.
I myself have had to test units to obtain the TRUE RMS specifications, where they were not available. This, if you have the equipment and the knowledge, is quite easy to do. But not everyone has the equipment and the knowledge.
When I purchased this amplifer, and before I modified it, the original Supplier stated that the MAXIMUM output power of this amplifier was 3400Watts. Since I am a Electrical Engineer, I questioned this specification and supplied the Supplier with the definition, as stated by the ASS and the IEEE,for MAXIMUM output. They responded by informing me that they actually meant PEAK output power.
Now before we go any further, PEAK and MAXIMUM output power ratings are not the same and should never be referred to as the same.
I contacted the Supplier again and asked them for a direct defintion of what they call PEAK power. They replied by saying that," PEAK power is around 10 times the RMS power ". So automatically it is very clear that the RMS rating of this product, as defined by the supplier/manufacturer, is only 340watts. Now understand that this is their definition. Other suppliers and manufacturers have different definitions. One will say it is 8 times the RMS. Another will say it is 12 times and one has even stated that it is 20 times the RMS value. The main point here is that everyone has a different definition of PEAK output power and unless you know their definitions you cannot compare one amplifiers ratings against another. Therefore the term "PEAK" is misleading.
To add to this confusion, some Seller's, state the term "MAXIMUM" power output and want you to believe that MAXIMUM is the same as PEAK power output, which it clearly is not.
Maximum power is between 2-4 times the RMS power rating. In most cases it is stated as 2 times the RMS rating.
If we apply this to our 3400watt amplifer and believe the Seller that PEAK is the same as MAXIMUM, then the RMS power of this amp would appear to be 1700watts, which it clearly is not.The actual RMS ouput, as measured by myself is 340 watts.Huge difference hey.
Now you can see why some Seller's do not list the RMS values for their products. I have seen on Ebay items quoted with maximum power, instead of peak power. They then say that the RMS power is half the maximum power and then state that result as the TRUE RMS power, which it is not. I know this can become quite confusing to some and this is why True RMS ratings are important when comparing amplifiers and speakers.
The lesson to be learnt here is simple...look for RMS values in the specifications and do not believe the other ratings, since the Seller of the product(s) have either no real idea of the correct specifications or they are trying to decieve the Buyer in purchasing their product over other's.
I now always list the specifications as supplied to us by the Supplier, Manufacturer and original Seller. I also list, where possible the TRUE specifications and the RMS values. If possible I test the products and determine the values myself. Sometimes this can be impossible to do and uneconomical. If I am unable to list the RMS values, then I will place a note in the advertisement clearly stating this.
I hope this helps the Buyer in making the correct deciscion when deciding what product to purchase. With RMS values a Buyer is able to do DIRECT COMPARISONS.
POSTAGE AND HANDLING
Please note PAYPAL users have to select and pay for registered post.
If a Buyer decides to use Regular Postage then the Seller will take no responsibility if the item sent is either lost,stolen, damaged or misplaced. The Seller has no real way of locating the item if reported missing. Also, there is no real insurance on the item and there is no way to track the item through the system. I am also unable to determine whether an item has been received or not. Buyer's should always try to use Registered Post and if possible try to insure the purchased item to it's full value. Remember the chosen carrier is usually responsible for transport and delivery. In most cases the service used will be Australia Post, unless the item is either too large or too heavy, then a Courier service will have to be used. Normal delivery time, once dispatched, is around 5 business days.
The above item, unless otherwise asked, will be sent via Regular Post. If a Buyer prefers Registered post then please add $3.50 to the above costs.
NSW,ACT..............................$25.00
VIC........................................$25.00
QLD......................................$25.00
SA,TAS.................................$25.00
WA,NT.................................$30.00
All costs associated with the delivery of the purchased item is the responsibility of the BUYER and not the SELLER of the product.
PLEASE NOTE: If theis item is paid via PAYPAL, then REGISTERED POST will have to be selected and paid for as the postal option.
Due to the NEW PAYPAL and EBAY payment rules I no longer have a choice.
WARRANTY
The purchased items come with a one year warranty. All claims are taken seriously and all help will be given to Buyer's having problems with their purchased item. Some items come with a Manufacturer's warranty. This means that the original supplier/manufacturer is directly responsible for the warranty. Where this is the case it will be stated in the warranty clause of the original advertisement in ebay. Items with manufacturer's warranty will have the details provided with the item when delivered. If there is no details, then please contact the Seller and we will help you organise the warranty claim and provide you with the correct information. All costs associated with warranty returns are the responsibility of the Buyer and not the Seller. If the item is deemed faulty, then we will repair /replace the unit and the costs to resend the unit back to the Buyer will be paid for by the Seller.If ther is no fault,then the return postage will have to be paid for by the Buyer.
If the units are installed by a non-professional then it will be very hard to claim warranty. These type of units can be easily damaged if they are installed by a non-professional. If you have problems, email me before you damage the units. I will help the people that treat me with respect and courtesy. Arrogance will only get you arrogance in return.
SELLERS REQUIREMENTS and PAYMENT
After the item has been won or purchased directly, a initial Invoice will be sent to the Buyer. This will include the total price for the item(s) and will list options available for Postage and delivery. It will also include a price for any extra requirements that the Buyer might want the Seller to perform prior to delivery. Example, extra wrapping,special delivery, etc.The Buyer will have up to 3 days to get in contact with the Seller and organise payment and delivery. The item purchased will have to be paid for within 3 business days of the purchase date, unless prior arrangements are made with the Seller. If a Buyer decides that they no longer want the item purchased, then they will have to notify the Seller prior to delivery. A 20% handling fee will apply to cover our costs. If an item is not paid for in the alloted time, then the Buyer responsible will be reported to Ebay and the item re-listed. If there are problems then please contact the Seller and do not avoid communications.
The preferred Payment method is Internet Banking and Direct Deposit. We do accept Money Order's and Credit Cards as per the Ebay guidlines. I also offer Paypal but prefer if a Buyer contacts the Seller prior to using Paypal. Sometimes their might be fees attached that require an explanation. Overseas Buyer's can only use Paypal, Direct Deposit or Money Order( in Australian currency). When using Direct Deposit please provide the Ebay transaction ID for easy tracking of Buyer's payment. If a cheque is used in a Direct Deposit payment, then please allow 7 days for payment to be accepted and cleared by the Seller's banking service. The item will be made ready for delivery only after payment has been received and cleared. The item will then be sent within 7 days of Buyer's payment clearing the Seller's Bank. If there are any questions please Email the Seller.
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*The estimated delivery time is based on the seller's handling time, the shipping service selected, and when the seller receives cleared payment. Sellers are not responsible for postage service transit times. Transit times may vary, particularly during peak periods.
A purchased item can be returned as long as it is incorrectly described. The costs associated with the return of the purchased item will be the responsibility of the Buyer and not the Seller. The item will have to be returned to the Seller for inspection before a refund or exchange can be authorized. If the unit described is correct, then all return fees assocaiated with the purchased item will be the responsibility of the Buyer and NOT the Seller of the item.
The buyer is responsible for return shipping costs.
Refunds by law: In Australia, consumers have a legal right to obtain a refund from a business for goods purchased (but not at auction) if the goods are faulty, not fit for purpose or don't match description. More information at returns.
Payment details
Payment method
Preferred/Accepted
Buyer protection on eBay
Accepted
Money order/Bank cheque
Accepted
Bank Deposit
Accepted
Not Available
Seller's payment instructions
Item has to be paid for within 3 days after the purchase date.
Prior to payment a Invoice will be sent to the Buyer listing details and options.
Item can be cancelled and comes with a 20% reshelving fee.
Item is processed only after payment is recieved and cleared and can take upto 7 days.
Delivery depends on the carrier and is between 3-10days
Paypal users must select and pay for registered post and must contact Seller prior to payment.
Seller assumes all responsibility for this listing.
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