T he new Tends PA-10 Tube Headphone/Preamplifier has finally arrived (and it was well worth the wait)! It is a fantastic addition to any TA-10 (or any T-amp or other power amp) system , providing better overall sound and improved full-range performance. We only have 110V units left and they are going fast. low-voltage hybrid The high-gain (20x) input works with low output-voltage sources making the PA-10 perfect for integrating an iPod, Mac or PC into your audio system! (tube/transistor) circuit design provides audiophile-quality sound. Add in compact size, pure class-A circuitry, easily-accessible headphone output (that drives even high-impedance headphones) and the fun, personalized "fine-tuning" and sound of tube rolling, and we think you will agree that this is a this fantastic preamp at an incredible price. Available in Standard and SE (Special Edition) versions. Standard comes with Chinese 6N11 tube; SE with Russian 6H23n. Pure class-A circuit for the best sound performance Supports both 6DJ8/6922 series and 12AU7 series tubes (just switch the jumpers). Makes tube rolling easy and fun! One bi-triode 6DJ8/6922 or 12AU7 tube as voltage amplification and two MOSFETs as output driver . 20x high-gain input matches iPod, Mac, PC or other low-voltage (<1.5V) sources to your other components. 3x standard gain Warm tube sound, excellent high fidelity and sufficient driving power to the next power amplifier stage. Two sets of switching audio inputs. Besides the normal CD input, the Phono (high-gain) input is provided for turntable or PC sound card. (NOTE: This is not RIAA equalized for phono) Easy-to-adjust tube bias with screw-drive potentiometers. See How To Aluminum case provides outstanding shielding & grounding capability to keep the background silent and maximize the S/N ratio DIY Friendly !Not only can you tailor the sound to suit your tastes through tube rolling, capacitor upgrades can make a difference, too. Here are the ones to change: Coupling Caps: C3 & C6 10 block caps Headphone output: C & C7 1000 tank caps Power Filtering: C2 & C5 PA10 Preamp Specifications
Vacuum Tube
6DJ8/6922 series or
12AU7 series (exchangeable)
Output Stage
MOSFET x 2
Amplification Gain
x3 (for Audio CD/DAC
IN)
Signal-to-Noise
Ratio (SNR)
92dB
Dynamic Range
92dB
THD+Noise
0.05% @ 10k ohm
Input
Audio CD/DAC IN RCA
(Left/Right) x 1 [3Vpp max.]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 1
Power Supply
DC 24V-26.5V (max.)
Dimensions
(W)76mm x (H)46mm x (D)114mm
Weight
380g
Power Supply Specifications
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
Tube-rolling with the PA-10 Before shipping , Trends Audio presets the jumpers and sets the DC bias voltage of each PA-10 for the packaged vacuum tube. Swapping tubes for different sound is the great fun and a great feature of PA-10. Trends PA-10 supports two major tube series: (1) 6DJ8, 6922, 6N11, 6H23n, ECC88, E88CC, and (2) 12AU7, 5963, 5814, ECC82. How to Adjust Bias
Trends PA-10 Features Trends PA-10 Trends PA-10 SE Tube Chinese 6N11 Russian 6H23n Audio Output Capacitor 10uF cap (Black) EVOX cap (White) Sound Quality Balanced with good fidelity Relative thicker & warmer midrange and heavier bass Price $225 $265
