Hudební fórum

Lachim píše:ha, EL34. To jsem chtěl vědět. Díky Lunchi

Hi John,

Thank you for your interest in VHT. Both Special 6 speaker cabinets (open back with Celestion G12H 30, closed-back with our own VHT ChromeBack speaker) are made from high-quality birch plywood.

The Special 6 head and combo cabinets are made of high-quality MDF.

The Special 6 was designed to be the world's most-affordable hand-wired tube amp; our design-target price for the combo was $200 USD MAP.

It was a very challenging cost-reduction exercise for the head and combo, but we managed to meet our target price by reducing materials costs whenever possible.

MDF is a good choice for smaller cabinetry, where plywood's extra resonance would be minimal, and MDF's less-resonant nature can be beneficial to the reduction of tube microphonics, etc.

Note that most high-end audio speaker cabinets are made from MDF, where it's selected for its lower-resonance and more consistent properties.
Yes, MDF is lower cost than the equivalent-quality birch plywood, but lower cost doesn't have to immediately imply lower quality.
That, in essence, is our mission and goal with the Special 6 — to provide, with the help of savvy design and cost management, "boutique values" at an unprecedentedly low price, and to introduce a new age of boutique-grade amplification.

The Special 6 output tube socket is wired with pin 1 (EL34 suppressor grid) tied to ground, so yes, we anticipated tube experimentation. Although the power transformer's heater-current capability is stressed with larger tubes like a 6550 or KT88, we have successfully thermal tested the Special 6 with a wide range of output tubes. (The socket wiring is not compatible with a 7027, please don't try!)

JJ

qwer píše:K tomu Blackheartu... Ja se s tim pral uz nekolikrat a to i primo u blackheartu. Jakmile se ty dva otolexovane dily uchyti sroubama na pevno k sobe, tak je to jak prilepene. U made in china zesiku to je snad i pravidlo, delaly me to vsechny. Zadni desku z 112 Orange jsem sundaval tak hodinu a to jsem se s tim moc nemazal. Dobry je si necim i pomoct, jen bacha na tolex a at to nedolames - chce to silu, ale ne hrubou silu bez premysleni.

Dan Rohanský píše:Spíš bych to teda píchl do returnu a o okna bych se taky moc nebál, s mp3 to tak nahlas nehraje...

core88 píše:

Dan Rohanský píše:Spíš bych to teda píchl do returnu a o okna bych se taky moc nebál, s mp3 to tak nahlas nehraje...

No pokud to píchneš rovnou na PI tak to ta MP3 moc nerozehraje . ale když to píchneš na RETURN tak to asi bude už rachot smyčka (pokud tamje) ten signál zase zesiluje ne ?