Assembeld Mono LJM L20.5 Ultra low distortion Power amp board + heatsink L9-13

Description

The default price are for one channel amp board with heatsink. usually to built a stereo amp. will need 2 of this board.
the board will be tested well before shipping out.
The L20.5 sound is accurate and has very low distortion. It is a representative product of LJM HIEND.
Excellent performance regardless of whether you use the preamp.
The L Series 200W amplifier designed by LJM uses a special CFP output and a COSCODE input stage.
4 pairs of imported KEC KTB817 KTD1047 power tube per channel.
Ultra low distortion circuit, HIEND design standard.
L20.5 amplifier parameters:
Each PCB size: 157*50mm
Output power 200W 8R, 400W 4R + -63V power supply.
125W 8R, 250W 4R + -50V power supply.
250W 4R, 500W 2R + -50V power supply
Maximum output current 15A, output maximum voltage sine wave + -63V. (+ -65V power supply)
Quiescent current per channel 20MA
Static power consumption = supply voltage * 0.02 (2W + -50V)
Power supply voltage range: + - 24V to + -65V
Recommended supply voltage and heat sink standard:
+ -35 to + -50V, heat sink 0.5KG per channel
+ -40 to + -60V, heatsink 1KG per channel
Gain GAIN=31 times
Frequency response = 20-25K HZ -0.15DB.
10HZ =-0.7DB 20K HZ=-0.05DB
Damping coefficient > 400, 8 ohm load.
Signal to noise ratio > 98DB.
Input sensitivity: 2V RMS 200W 8R power
Install the connection ID:
VCC+ positive power supply, VEE- negative power supply, PGND power supply ground.
IN+ input signal +, IN- input signal -
OUT+ output signal +, the negative pole of the speaker is connected to the GND position of the power board.
It is recommended to
Series connection
a bulb in the primary of the 220V transformer for testing.
Remove the lamp after normal use.
THD+N amplitude (+ -35V supply voltage)
THD = 0.0015%
IMD Intermodulation Distortion Test = 0.002 (output power 50W 8 R)
THD+N distortion map
THD+N= 0.001-0.002% 20HZ-20KHZ Output power 10W Load 8 ohms
THD+N=0.001% A weighting
Shipping time:
Default send by air mail. to US,CA，Mexico and most Europe, Asian countries，about 15-22 business days can arrived ,to Russia, Brazil,Africa.Ukraine and some other remote countries will need 30-40 working days.
Payment:
We ONLY accept PayPal. Payment must be made within 3 days of the auction end time. Non-Paying bidders will be reported.
All items will be shipped within 1-3 business days (from china)upon receipt of payment.
We ONLY send item to buyer's registered Paypal address,Buyer must be responsible for their postal address
Customs & duties:For cross-border transactions,.we are not responsible for tariffs and duties. However, buyers may be responsible for  actual, applicable tariffs, and duties as requested brespective country laws
Return & Exchange:
>> Some items return is accepted within 7 days after the buyer's receiving the item.(please see the detail describe)[In case of DOA (Dead on Arrival), please report within 3 days]
>> Returned item has to be new, unworn and in its original condition.
>> After getting the returned item, we will refund the customer at the item's price ( excluding the shipping costs to and from )