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Summary of Contents for Absolare Push-Pull
- Page 1 ABSOLARE Push-Pull Mono Amplifier User Manual...
- Page 2 ABSOLARE Push-Pull Mono Amplifier User Manual 1.2...
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Page 3: Table Of Contents
6.1. General Operation ......................10 6.2. Setting the Bias Levels ....................10 6.2.1. 845 Bias Levels ......................11 6.2.2. EL34 Bias Levels ...................... 12 7. Troubleshooting and Maintenance ..................13 8. Technical Specifications ....................... 13 ABSOLARE Push-Pull Mono Amplifier User Manual 1.2... -
Page 4: General Description
1. General Description The Absolare Push-Pull Mono Amplifier is a transformer coupled, zero feedback, monoblock power amplifier, supplied in matched pairs for stereo amplification. It features an all tube, point-to-point construction signal path. It is available in both transformer balanced (XLR) and unbalanced (RCA) input versions. -
Page 5: Unpacking And Placement
Retain the cloth and all packing materials for future use. Each Push-Pull Mono Amplifier may become very hot during operation. You should always place them on support feet and leave at least 2 inches (5 cm) clearance above each Amplifier to allow sufficient ventilation. -
Page 6: Installing The Tubes
4. Installing the Tubes There are total of 5 tubes in each monoblock. Placement of tubes is shown below: ABSOLARE Push-Pull Mono Amplifier User Manual 1.2... - Page 7 CAUTION: Incorrect positioning of 845 tube may seriously damage the amplifier! ABSOLARE Push-Pull Mono Amplifier User Manual 1.2...
- Page 8 The 12AT7 / ECC81 tube has one missing pin acting as a correct positioning key. Align the missing pin with the missing hole in the tube socket while inserting. ABSOLARE Push-Pull Mono Amplifier User Manual 1.2...
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Page 9: Connecting The Cables
Since the output is transformer coupled, there is no output power difference when using 4 or 8Ω speakers. Always use a combination of either 0 + 4Ω, or 0 +8Ω binding posts. NEVER connect speaker cables in a combination of 4Ω + 8Ω terminals. ABSOLARE Push-Pull Mono Amplifier User Manual 1.2... -
Page 10: Operating The Unit
6. Operating the Unit 6.1. General Operation Before turning on each Absolare Push Pull Mono Amplifier, be sure that all tubes are installed and all cables connected correctly. If you have changed 845 output tubes you should first minimize the bias settings (by rotating to counter-clockwise) before turning-on the amplifiers and re-adjust the bias settings. -
Page 11: 845 Bias Levels
You should read a value about 0.500V (500mV) for each tube. If the readings are different, then adjust the bias level via potentiometers near the EL34 tubes. A small flat screwdriver will be necessary to access internal bias trim pots. ABSOLARE Push-Pull Mono Amplifier User Manual 1.2... -
Page 12: El34 Bias Levels
There are no separate manual bias adjustments for the two EL34 tubes, but the push-pull symmetry is important. With a multimeter at lowest DC volt measurement setting, insert black and red probes into blue sockets. The adjustment point is in between the EL34 tubes. -
Page 13: Troubleshooting And Maintenance
Call your dealer. Noise / hum in the sound - Check grounding of power, input cables and source. If the problem is persistent, contact your nearest ABSOLARE dealer. 8. Technical Specifications Zero Feedback, Push-Pull Architecture Point-to-point construction Tubes: 2 x 845, 2 x EL34, 1 x 12AT7 / ECC81 (for each unit) - Page 14 ABSOLARE USA LLC 40 Pemberton Road, Nashua New Hampshire, 03063 Phone: +212-229-1842 E-mail: info@absolare.com ABSOLARE SERVICE EUROPE Mozartstraat 157, 1962AL Heemskerk, Netherlands Phone: +31 61 399 3049 E-mail: info@absolare.nl...
- Page 15 © 2020 ABSOLARE ABSOLARE Push-Pull Mono Amplifier User Manual 1.2...