FAQ
1. Can Trends PA-10 Tube Headphone/Pre amplifier be the Phono Amplifier ? No. Trends PA-10 Tube Headphone/Pre amplifier does not support RIAA. 2. What are the difference between CD Input and Phono Input The CD is normal input. The Phono input with higher gain is provided for small output phono amplifier or PC/Mac/iPod. For example: CD Input: Standard gain = 3 x Phone Input: Hi gain = 20 x 3. It is very loud, boom with flabby bass when I turn on Trends PA-10. Why ? It is normal that the vacuum tube have to warm up for several minutes to the stable condition. The temperature is also a factor for the bias voltage. 4. I once accidentally turned on the Trends TA-10 T-amp before I turned on the Trends PA-10 Pre-amp and the tube kept blinking with an intermittent popping sound. Any explanation for that? We suggest that you turn on the Trends PA-10 Pre-amp firstly. For example: Trends PA-10 Pre-amp Trends TA-10 Amplifier Switch On: First Second Switch Off: Second First 5. How can I change another vacuum tube for Trends PA-10 Tube Headphone/Pre amplifier? Trends PA-10 Tube Headphone/Pre Amplifier supports two major tube series: (1) 6DJ8, 6922, 6N11, 6H23n, ECC88, E88CC, etc , and (2) 12AU7, 5963, 5814, ECC82, etc If you change the tube within the same series, it needs to re-tune the DC bias voltages ONLY. If you change the tube from another series, it needs both to re-tune the DC bias voltages and re-set the jumpers. Otherwise, the tube may be burnt out. 6. How do we set the best sound performance from the Trends TA-10 Amp and Trends PA-10 Tube preamp bundle? Trends PA-10 Tube preamp support CD input with 3X high gain. Please refer to the following setting for the best performance from Trends TA-10 Amp and Trends PA-10 Tube Preamp - Trends TA-10 Amp as an Integrated Amp Trends TA-10 Amp. Trends PA-10 Tube Preamp Volume Control(Maximum) 12 o'clock Any level - Trends TA-10 Amp as a Power Amp Trends TA-10 Amp. Trends PA-10 Tube Preamp Volume Control(Maximum) Fix 9 o'clock Specifications Specifications Vacuum Tube 6DJ8/6922 series or 12AU7 series (exchangeable) Output Stage MOSFET x 2 Amplification Gain x3 (for Audio CD/DAC IN) x20 (for Audio PC/iPod IN) Signal-to-Noise Ratio (SNR) 92dB Dynamic Range 92dB THD+Noise 0.05% @ 10k ohm 0.15% @ 33 ohm Input Audio CD/DAC IN RCA (Left/Right) x 1 [3Vpp max.] Audio PC/iPod IN RCA (Left/Right) x 1 [0.55Vpp max.] Power Socket (5.5mm/2.1mm) x 1 Output Audio OUT RCA(Left/Right) x 1 Headphone OUT (3.5mm) x 1 Other Switch & Knob Audio IN selection switch x 1Power ON/OFF switch x 1 Power Indicator (Blue LED under Tube Socket) x1 Volume Knob x 1 Power Supply DC 24V-26.5V (max.) Dimensions (W)76mm x (H)46mm x (D)114mm Weight 380g 1.2 Specification of the Trends PA-10 Tube Headphone Amplifier Unit Vacuum Tube 6DJ8/6922 series or 12AU7 series (exchangeable) Output Stage MOSFET x 2 Amplification Gain x3 (for Audio CD/DAC IN) x20 (for Audio PC/iPod IN) Signal-to-Noise Ratio (SNR) 92dB Power Output: 3.0 Watts per channel on 33 Ohm Headphone Frequency response: 15 Hz - 100 kHz -1db Input Impedance: 100k Ohms THD+Noise 0.05% @ 10k ohm 0.15% @ 33 ohm Input Audio CD/DAC IN RCA (Left/Right) x 1 [3Vpp max.] Audio PC/iPod IN RCA (Left/Right) x 1 [0.55Vpp max.] Power Socket (5.5mm/2.1mm) x 1 Output Audio OUT RCA(Left/Right) x 1 Headphone OUT (3.5mm) x 1 Other Switch & Knob Audio IN selection switch x 1Power ON/OFF switch x 1 Power Indicator (Blue LED under Tube Socket) x1 Volume Knob x 1 Power Supply DC 24V-26.5V (max.) Dimensions (W)76mm x (H)46mm x (D)114mm Weight 380g 1.3 Specification of the AC Adaptor AC Input Universal AC 100V-240V/50-60Hz DC Output DC 24V 0.6A (15W) DC Plug DC 2.1mm Ripple & Noise <= 25mV Over-load Protection 105%-150% Over-voltage Protection 115%-150% Dimensions (L)78mm x (W)50mm x (H)33mm Weight 150g To continuously improve our product, we reserve the rights to change some specifications without further notice.