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  « QAQ6 12AX7 Tri-tube Preamplifier 4 Ins 2 Outs »
April 26th, 2024, 5:36pm
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   [Singapore] HIFI Equipment (Buy/Sell)
   QAQ6 12AX7 Tri-tube Preamplifier 4 Ins 2 Outs
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   Author  Topic: QAQ6 12AX7 Tri-tube Preamplifier 4 Ins 2 Outs  
QuartzAcoustic

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QAQ6 12AX7 Tri-tube Preamplifier 4 Ins 2 Outs
« on: November 6th, 2020, 3:17pm »

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Modded and Upgraded Reisong QAQ6 12AX7 Tri-tube Preamplifier 4 Ins 2 Outs with Swappable Capacitors for High Clarity Vocals and Wide Soundstage at $940

See detail write up of preamp here: https://bit.ly/3k2wF5c


• Limited sets available in stock now. Usual lead time in restock and modification and upgrade is 12-14 days

• OEM Reisong Q6 (advanced set, not the basic set - see below) with marked improvements from modifications and upgrades.

• Our QAQ6 is the Reisong factory advance unit which includes 6V6 and 6J1 as part of the current stabilisation setup on the rectifier board.

• The unit sold in Aliexpress for over S$590 (with shipping) is the basic set without 6V6 and 6J1 in rectifier board.

After a long period of going through trials and test, the new amplifier, QAQ6, to succeed the previous QA-M7U1 is finally ready.

• 4 inputs 2 outputs
• Main coupling capacitors installed with terminals for easy changing of caps to any brands or grades for different level of sound
• Default installation of coupling caps is the midrange hifi upgrade in ClarityCaps CSA. Midrange is exceptionally smooth and balanced with these highly acclaimed caps
• Secondary caps upgraded to WIMA MKP10 to improve on the clarity further from the stock caps
• Filter caps upgraded with vintage NOS Philips caps to complete the audiophile grades of caps used in the output PCB board
• Comes with either JJ or Electro-Harmonix (EH) 12AX7, probably the best starting brands for 12ax7 for their linearity and balanced sounds
• Comes with metal tube shields for 12AX7 to slightly reduce RFI
• Widely available Reisong Q6 is the normally the basic unit where there is only one 6Z4 rectifier tube in the rectifier board
• QAQ6 is the unit where it is the factory advance set which includes 6V6 and 6J1 as part of the current stabilisation setup
• Together with the 6Z4/6X4 rectifier tube, the rectifier board in QAQ6 is another tri-tube setup of ensuring the most optimal current is supplied to the 12AX7s
• Stock units of Reisong Q6 does not get the ability to use 6X4 tube despite the socket being present because the lead of a resistor has to be resoldered
• QAQ6 has performed the modification and made the option easy for users, where either one of 6Z4 or 6X4 can now be used
• But 6Z4 in QAQ6 has managed to impress us a lot, that using 6Z4 is in fact perfectly fine
• As the stock tubes included in the rectifier boards are purely Chinese tubes, both 6Z4 and 6V6 have both been upgraded with the ‘Russian Rockets’, Soviet-made Reflektor 6U4n-Eb and 6n6n respectively
• The Reflektors increased the intensity of the bottom end while pushing the vocals more forward
• The trusted GE JAN 5654W is used as an affordable upgrade over the stock Chinese 6J1. This tube also provides some sparkle of the midrange
• The upgrade of these 3 tubes effectively smooths out the brash and harshness of the stock Chinese tubes
• Large and heavy pots for the input selections and volume control on the front panel


SMS or WhatsApp +65 9423 9296 to enquire or order.















Specifications:

• Frequency response: 19Hz-43kHz ± 0.5dB
• Output voltage: 16.5V (Max)
• Total Harmonic Distortion: ≤ 0.2% (1kHz 5V)
• Input sensitivity: 1000 mV
• Signal to noise ratio: 95dB
• Input impedance: 100K ohms
• Output impedance: 1010 ohms (theoretical data after implementation of internal attenuator -21dB))
• Tubes: 12AX7 (Either EH or JJ) x 3, Reflektor 6U4n-Eb x 1, Reflektor 6n6c x 1, GE JAN 5654W x 1
• Dimension: 420W * 380D * 13.5H mm
• Net weight: 8.5kg
• Gross weight: 10.5kg
• Input Power Voltage: AC100V - AC240V(60Hz/50Hz)



SMS or WhatsApp +65 9423 9296 to enquire or order.

CarouPay acceptable at Carousell page -> https://bit.ly/3l49YyE

« Last Edit: November 7th, 2020, 1:24am by QuartzAcoustic » Logged

Looks good, sounds better
Quartz Acoustic Pte Ltd (Co Reg No. 201706979E)










 




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