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This made little sense to me but again looking at the output of 22V distortion) it suddenly did! 33mV Cadenza and I was able to run my preamp at -19dB. For whatever reason, 45dB was more than sufficient for the. Hagerman proved subjectively correct if objectively not. Be sure to hit the “mute” button before adjusting gain! That warning should have been in the instructions! “THUMP” through the speakers that shut down my amplifiers. 33mV Ortofon Cadenza Black, for instance, at 45dB gain, which is MM gain? I started there, dutifully following instructions but figured I’d try 55dB so I turned the knob one click and got a super-loud D.C. Setting gain as low as possible makes sense if you understand what exactly that means. Hagerman suggesting running a low output moving coil cartridge loaded at 47kHz? Seems so but that’s clearly not correct so how can that be “best operation”? Hopefully he’ll answer in a comment. The MC setting instructions are somewhat unusual. 47kHz is with the loading knob fully clockwise. Hagerman means 45dB, or all the way to the left. MM cartridges will only function properly with LOADING set to 47kHz and gain at 44dB”. The instructions say “Best operation is to run LOADING as high as possible (clockwise) and GAIN as low as possible (counter-clockwise). After an initial delay of a bit less than a minute the internal high voltage supplies turn on and shortly thereafter when both LEDs light yellow, the unit ready to play. Neither are marked so you have to read the instructions to know what’s what. The front panel features a pair of “old school” knobs, the left one labeled “load”, the right one “gain”. Avoid stiff, heavy cables because unless carefully dressed they could displace or flip the lightweight chassis. The rear panel features chassis mounted gold plated RCA input and output jacks, a ground lug and an input pin for the outboard 15VDC “wall-wart” type power supply. I auditioned the Trumpet MC using both the Ortofon 2M Black 250 LVB and the Ortofon Cadenza Black mounted on the SME Model 6 turntable I reviewed in Stereophile.

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Other claimed specs are: 10Hz-50kHz bandwidth, 70dBA ref 0.5mV (93dBA ref of full signal) noise, distortion, distortion and ☐.5dB RIAA accuracy.

Resistive loading choices are 47ohms, 100ohms, 220, 470, 1K and 47K-a sufficient range for most of us.

Premium components used throughout include polypropylene capacitors and metal film resistors.īy high performance audio standards, the powdercoated aluminum chassis is thin (the whole thing weighs a mere 3 pounds), but consider that the Trumpet sells for $1099 and provides gain choices of 45dB, 55dB, 60dB, 64dB and 68dB-sufficient for even the lowest output MC cartridges. and that after a 40 second start up delay, “a highly specialized internal low-noise booster converter generates the B+ and B- rails”. The circuit description says the tube heaters are D.C. The JFET input provides variable gain and loading, with split-passive RIAA equalization and 0 feedback throughout. Each tube came fitted with a damping ring. Hagerman Audio Lab’s 3rd generation fully balanced from input to output 3 pound Trumpet MC combines a differential JFET input front-end with a more conventional 6 dual-triode vacuum tube (4X 12AX7, 2X 12AU7) gain/ phase-splitter/driver/output (if I misread the schematic, which is possible, Hagerman will correct me!).

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