Used Parasound Halo A51 5 Channel Power Amplifier. Working condition, been unused for a few years. Sold as is.

SYLVANIA, Made in USA5751 Valve TubeShort Grey Plates, Triple Mica Construction & Halo GetterFully Tested on AVO VCM 163Ia 0.75/0.8 - Gm 1.1/1100% Book Spec = Ia 1 - Gm 1.2Used, Supplied in White Box

Used Parasound Halo A51 5 Channel Power Amplifier. Working condition, been unused for a few years. Sold as is.

SYLVANIA, Made in USAJHS 5751 Valve TubeShort Grey Plates, Triple Mica Construction & Halo GetterFully Tested on AVO VCM 163Ia 1.15/1.1 - Gm 1.1/1.2100% Book Spec = Ia 1 - Gm 1.2Used, Supplied in White Box

SYLVANIA, Made in USA5751 Valve TubeShort Grey Plates, Triple Mica & Halo GetterFully Tested on AVO VCM 163Ia 1.2/1.05 - Gm 1.2/1.2100% Book Spec = Ia 1 - Gm 1.2Used, Supplied in White Box

GE 5751 Double Triode Halo Getter Tests Good USA See photos for condition. Tests good on Taylor Model 45C valve tester. Triode 1 mutual conductance reading Gm 2.0 Triode 2 mutual conductance reading Gm 1.8 100% factory data in Taylor manual at Gm 1.2 UK shipping with MyHermes Tracked or Royal Mail. International shipping with Royal Mail International Tracked. I will combine postage on multiple valve orders. See my other listings!

Hello Friends: Here is a Parasound Halo A51, 5-channel amplifier (250W X 5), in silver finish. Unit is in pristine operation and cosmetic condition. No scratches or dents. Has been well cared for. Used conservatively, never over-stressed. Was mounted externally (top of rack, in open air) for optimal thermal cycling/ventilation. Unit includes: original manufactures carton/box and packaging materials, rack mounting brackets, original AC cord, user manual. One of the best multi-channel amplifiers available. The best sounding amp Ive ever owned. Those familiar with Halo products know the quality of construction and performance. I am original owner. Priced to sell. Will ship to lower 48 states, only. I am downsizing, moving into a much smaller living situation. (unit specifications, from Parasound website): Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels driven Current capacity: 60 amperes peak per channel Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt Total harmonic distortion: < 0.2 % at full power IM distortion: balanced 16 V rms < 0.04 % Slew rate: 130 V/µsecondDynamic headroom: 1.5 dBInterchannel crosstalk:78 dB at 1 kHz; 63 dB at 20 kHzInput sensitivity: 1 V for 28.28 V, THX Reference Lev Input impedance: 47 k ? unbalanced; 94 k ? balanced S/N ratio: 112 dB, input shorted, IHF A-weighted Damping factor: 1100 at 20 Hz Voltage: 110V - 120V Dimensions: 17-1/2 w x 7-5/8 h x 20 d, 7 h without feet Net weight: 80 lb.

MAXI & TV-7 TESTED RCA COMMAND SERIES 5751 AUDIO TUBE BLACK PLATE HALO GETTER ***FREE SHIPPING*** TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). THE MAXI PREAMP II TESTS TUBES AT 200 VDC PLATE CURRENT 4 TIMES PER SECOND. Gain(Mu) Section A = 73.4 Gain(Mu) Section B = 72.1 Tester Gain (Mu) Range = 0 - 120 Tester 5751 Expected Gain (Mu) value = 70 Transconductance (Gm) Section A = 1589 Transconductance (Gm) Section B = 1610 Tester Gm Range 0 - 9900 Noise (dB) Section A = -86.6dB Noise (dB) Section B = -85.7dBTester Noise (dB) Range -92dB - 0dB While performing an audio tap test on the Maxi Preamp played through a guitar amplifier triode A tested good & triode B tested good when tapped. TV-7 Test Results: Minimum good value on the TV-7 is 32.Triode A Tested: 54 Triode B Tested: 58 TEST RESULTS ARE SHOWN IN PHOTOGRAPHS. I OFFER A 100% REFUND UPON RETURN OF THE ITEM SHOULD IT NOT MEET YOUR EXPECTATIONS OR NEEDS. LOT 1250

Parasound HALO A51 Five Channel Power Amplifier I have had this amp for a few years and has been used at most once every couple months for my rear channels. The amplifier has remained in my rack since purchased. There are very light scratches on a few of the fins from the initial placement of the amp in the rack, but is sonically perfect. Circuitry designed by legendary John CurlTHX Ultra2 certifiedHigh bias Class A/AB operationBalanced inputs with discrete circuits and XLR connectorsDirect Coupled - no capacitors or inductors in signal pathComplementary MOSFET driver stage and JFET input stage40 beta-matched 15 amp, 60 MHz bipolar output transistors2.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel164,000 ?F power supply filter capacitanceDC Servo and relay protection circuitsAC present, channel status, high temperature indicatorsHeavy-duty 24k gold-plated 5-way speaker terminalsGold-plated RCA input jacks; ground lift switchAuto turn-on by 12v trigger or audio signal4u Chassis, carry handles, rack mounting adapter includedContinuous power output:250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels drivenCurrent capacity:60 amperes peak per channelPower bandwidth:5 Hz - 100 kHz, +0/-3 dB at 1 wattTotal harmonic distortion:< 0.2 % at full powerIM distortion: balanced 16 V rms< 0.04 %Slew rate:> 130 V/µsecondDynamic headroom:> 1.5 dB Interchannel crosstalk:> 78 dB at 1 kHz;> 63 dB at 20 kHzInput sensitivity:1 V for 28.28 V, THX Reference LevInput impedance:47 k ? unbalanced; 94 k ? balancedS/N ratio:112 dB, input shorted, IHF A-weightedDamping factor:> 1100 at 20 HzVoltage:110V - 120VDimensions:17-1/2 w x 7-5/8 h x 20 d, 7 h without feetNet weight: 80 lb.

I am selling my Parasound A51 due to a system downgrade; I have too many amps in the rack! The amp is flawless and is currently connected to my home cinema. I believe I have the box in the loft, so in that case postage would be quite straight forward. But due to weight and insurance costs, expect to pay around £90 for a UPS insured delivery. Collection would be preferred or could deliver within a reasonable distance.Apologies for only a front-facing photo, but the amp is located near a back wall, plus I have XLRs and speaker cables going in, so you can imagine how difficult it would be to photograph the back!If you have any questions, feel free to ask. Thanks for looking... ps: buyers outside the UK please contact me first to discuss your import tax fees, and expect a 3-4 day delivery with UPS.

Five vacuum tube lot of GE 5751 Halo getter... Tested good on a Heathkit TC-2.View all images before purchase. MB02

Pair 5751 SYLVANIA, solid halo disk getter. Vacuum Tubes Made in USATested on Hickok TV7-A/U. Min. Recom: 32 - 32. (65%) NOS= 46 (100%)Values: 43 - 44, 47- 48 Combined shipping is accepted. Shipping well packed, for safe transit & Delivery, by International postal post, certificated & registered. Tracking & Signed to delivery.

RCA 5751 vacuum tube short black plate Tested with a calibrated TV-7D/U tube tester. Calibration by Daniel Nelson. Code: unreadable NOS/Used: used Construction: short black plate halo getterGlass: no burn marks Base:-Tested at: 40/44 GMMinimum: 32/32 GMThe minimum is equal to 65% of a new tube. Tested for shorts and gas. 30-day free return. Your items will be packed very well and shipped promptly.We combine shipping on tubes.Always glad to answer any questions.Thanks for looking!