TRUMPET REFERENCE Vacuum Tube
Contents
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7. g TRUMPET REFERENCE Vacuum Tube Phonostage Made in USA TRUMPET REFERENCE Vacuum Tube Phonostage 2 Copyrights amp Trademarks Copyright Hagerman Audio Labs 2013 All rights reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent Disclaimer The information contained in this document is subject to change without notice Hagerman Audio Labs shall not be liable for errors contained herein or for consequential damages in connection with the furnishing performance or use of this material Warranty Hagerman Audio Labs warrants this product free of defects in materials and workmanship for a period of 10 years 90 days on tubes If you discover a defect Hagerman Audio Labs will at its option repair or replace the product at no charge to you provided you return it during the warranty period transportation charges prepaid to Hagerman Audio Labs This warranty does not apply if the product has been damaged by negligence accident abuse or misuse or misapplication has been damaged because it has been improperly connected to other equipment or has been modified without the express written permission of Hagerman Audio Labs This warranty is limited to the replacement or repair of this product and not to damage to equipment of other manufacturers Any applicable implied warranties including warranty of merchantability are limited in duratio
8. tube rolling New old stock NOS tubes are generally the best offering various sonic improvements with the final result becoming a matter of personal taste Try to match in left right pairs to maintain equalization frequency balance Always replace tubes with their equivalents Do not use for example a 12AT7 in one of the 12AX7 locations Starting from the rear of the unit the tubes are in order 12AX7 12AX7 12607 12AU7 Cartridge loading depends on the length and type of interconnects used and it is always good to start with a value close to the manufacturer s recommendation Generally loading provided by the Trumpet Reference is effectively lower than the equivalent from a transformer That is if you like the sound from 100 ohm transformer loading into the MM input then try the 131 ohm setting on the MC input In the end do not worry about numbers Adjust to what your ears prefer As far as gain selection it is better to go with lower gain if possible This optimizes overall headroom and distortion of the audio system The EQ settings provide various curves for achieving better sound from your vinyl playback The 3 LED from the left is RIAA modern as will be used most often The Decca and Columbia curves help with some older microgroove LPs Again this is adjusted for personal preference and was never an exact science Nevertheless this can make a significant improvement for certain instruments such as violin and on vocals
9. Hz Bandwidth 8Hz to 500kHz Distortion lt 0 05 1kHz Noise 70dBA MC Size 17 x 12 x 5 Weight 19 Ibs Power 120Vac 240Vac 70W Tube Compliment 12AX7 x 4 12AU7 x 4 a second input and TRUMPET REFERENCE Vacuum Tube Phonostage 4 Operation The Trumpet Reference installs between your turntable and linestage Be sure to connect the ground lead to the grounding lug near the inputs Connect the power cord to an AC source Turn on using the power switch on the back panel Press the POWER button on the front Immediately the heaters will turn on and after a 32 second delay the high voltage supplies will activate Controls Control Description POWER This button toggles power on and off The left LED indicates heater voltage for the tubes the right LED indicates high voltage EQ There are four settings defined by turnover and cut arranged left to right 40012 1108 AES early ffrr 500Hz 11dB Decca EMI late ffrr 500Hz 13 7dB RIAA 500Hz 1698 Columbia NAB STEREO Left LED is mono INPUT Left LED is MM POLARITY Left LED is inverted MC GAIN There are two gain settings MC 6408 gt 0 25mV cart 7008 lt 0 25mV cart LOADING There are eight loading settings MC arranged left to right 1k 322 181 131 TRUMPET REFERENCE Vacuum Tube Phonostage 5 Commentary The Trumpet Reference responds admirably to
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11. n to a period of the express warranty as provided herein beginning with the original date of purchase and no warranties whether express or implied shall apply to the product thereafter Under no circumstances shall Hagerman Audio Labs be liable for any loss direct indirect incidental special or consequential damage arising out of or in connection with the use of this product Hagerman Audio Labs PO Box 61911 Honolulu HI 96839 808 383 2704 www haglabs com TRUMPET REFERENCE Vacuum Tube Phonostage Description The Trumpet Reference is a true reference class phonostage for the most demanding of audiophiles Based on the original Trumpet Stereophile class A recommended component it adds pushbutton control of all functions upgrades for many of the components The chassis has also been changed to reflect the reality of equipment racks by putting the power supply and amplifier boards in a side by side configuration Status LEDs on the front panel indicate operational settings of the various functions In addition to standard RIAA equalization three other curves used in the LP microgroove era have been included This combination of features convenience and sonic performance are unmatched at this price Specifications Item Gain Specification 44dB MM 64dB 70dB MC Input Impedance 47k MM 1k 322 181 131 91 76 64 57 MC Output Impedance 800 ohm RIAA Response 0 5dB from 20Hz to 20k
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