JTX50

JTX45

JMX50

$2700.00

$2600.00

$2500.00

MAJOR FEATURES




CONTROLS


Front Panel (R-L):

Input Jack

Normal Volume

Channel Select Switch

Bright Volume

Bass

Mid

Treble

Master Volume

Presence

Standby Switch

Power Switch

Power Indicator



Rear Panel (L-R):

Footswitch Jack (depending on selected options)

Send Level (if purchased w/ optional Loop)

Send Jack (if purchased w/ optional Loop)

Return Jack (if purchased w/ optional Loop)

Return Level (if purchased w/ optional Loop)

Loop True Bypass Switch (if purchased w/ optional Loop)

Impedance Selector

Speaker Jacks (two)

HT Fuse

Mains Fuse

IEC Power Inlet



TUBE COMPLEMENT


JTX45

1x 5AR4/GZ34 Rectifier Tube

2x KT66 Power Tubes

3x 6SL7GT Octal Preamp Tubes (4x w/ Loop)


JTX50

1x 5AR4/GZ34 Rectifier Tube

2x EL34 Power Tubes

3x 6SL7GT Octal Preamp Tubes (4x w/ Loop)


JMX50

2x EL34 Power Tubes

3x 6SL7GT Octal Preamp Tubes (4x w/ Loop)


JMX100

4x EL34 Power Tubes

3x 6SL7GT Octal Preamp Tubes (4x w/ Loop)



MISCELLANEOUS SPECS


Power Requirements:  

JTX45, JTX50, JMX50: 120 VAC, 60 Hz, 2A or 240VAC, 50-60 Hz, 1A (wired for your region)

JMX100: 120 VAC, 60 Hz, 3A or 240VAC, 50-60 Hz, 1.5A (wired for your region)

Size (H x W x D): 9.5” x 26” x 8.75”

Weight:

JTX45, JTX50, JMX50: 42 lbs

JMX100: 44 lbs


Includes Amplifier, Hospital Grade Power Cord and printed Owner’s Manual



DOWNLOAD


      Owner’s Manual

JMX50 - Late ‘60s 50w plexi circuit, EL34 output section, silicon diode rectification

BC-Audio_Octal-Plex-Series_Owners-Manual.pdf

Accessories

Free shipping on all accessories when purchased with an amplifier.

JTX50 - Transitional plexi circuit, EL34 output section, GZ34 rectifier

A WORD ABOUT PRICES


Rather than using a combination of MSRP, list, retail, MAP and street prices, I employ a more direct approach called Pro-Net pricing.


The Pro-Net price reflects the actual value of the product. There is no artificially high list price coupled with a more realistic street price. I find Pro-Net pricing to be clear and straightforward. I hope you will, too.


OCTAL-PLEX SERIES ORDERING INFO


To order, first click here to see if I have the amplifier you want in stock. If not, simply add the Deposit and any desired options or accessories to the shopping cart. After checkout, I will contact you to confirm your order and timeframe. When your amplifier is complete and ready to ship, I will contact you for payment of the remainder of the purchase price. Shipping rates apply to the continental United States. Contact me for international shipping quotes.


WAIT TIME


Wait time is measured in weeks, not months. Please contact me for the current wait time for your desired model and options.


EVALUATION PERIOD and RETURN POLICY


When you buy from BC Audio, you have a 14-day evaluation period to fully explore your new BC Audio amp. If you are not 100% satisfied, you may return the product within the evaluation period for a refund, excluding shipping charges. Due to the somewhat custom nature of Octal-Plex Series amps, returns are subject to a 5% Restocking Fee. This also applies to the deposit should you cancel your order prior to shipment. Products must be returned in as-new condition, with all originally included accessories and documentation. Returned items that are found to not be in as-new condition will be subject to deductions from the refund to cover the cost of repair or diminished value at the sole discretion of BC Audio.

JTX45 - Early plexi circuit, KT66 output section, GZ34 rectifier

Master Volume

Post-phase inverter Master Volume (PPIMV), included in all Octal-Plex Series amps at no additional cost


Bass Spec

Warmer and mellower, favored by many Strat players; no additional charge


Gain Boost

Foot-switchable Gain Boost (not a tone stack lift); includes LED illuminated footswitch


Volume Boost

Foot-switchable Volume Boost; includes LED illuminated footswitch


Effects Loop

Tube Buffered Effects Loop with Send Level, Return Level and True Bypass switch


Custom circuit tweaks

Tailored specifically for you. Want it brighter or mellower? More gain or more headroom? Tighter or looser power section? Different rectifier? Different style MV? Cut instead of Presence? Footswitch loop bypass? I can perform any number of alterations to make your amp a truly custom affair. Contact me to discuss your needs.

Based on the earliest plexi amps of the mid '60s. Big vintage tone. Full, round cleans. Warm and creamy overdrive. Plenty of low end.

JTM45 circuit: KT66 power tubes, GZ34 rectifier, shared V1 cathodes, small bright cap, small mix resistors, early tone stack, large PI coupling caps, lots of negative feedback, very low B+ rail filtering.

Based on the rare but mighty transitional "flag logo" plexi. Brighter, more aggressive voice. EL34 crunch with tube rectifier sag. Raw, raunchy and loud as hell.

JTM50 circuit: EL34 power tubes, GZ34 rectifier, shared V1 cathodes, medium bright cap, large mix resistors, early tone stack, large PI coupling caps, less negative feedback, high B+ voltage, moderate B+ rail filtering.

Based on the classic late '60s 50w plexi. Even more aggressive, mean and in-your-face. Earlier breakup, more gain, with a thick, meaty crunch. Tighter response, less sag. Cuts thru the mix.

JMP50 circuit: EL34 power tubes, silicon diode rectification, split V1 cathodes, smaller bright channel coupling cap, large bright cap, large mix resistors, later tone stack, bypassed V2a cathode, small PI coupling caps, less negative feedback, lower B+ voltage particularly in the preamp, heavy B+ rail filtering.

CUSTOMIZATION OPTIONS

Included



No Charge



$100



$150



$250



$ Varies

Submit Submit Submit Submit Submit Submit

Padded Cover $50

High quality 3/8” foam, soft cloth backing

Submit

JTX45 Spare Tube Set $285

4x 6SL7GT + KT66 Matched Pair + GZ34/5AR4

Submit

JTX50 Spare Tube Set $270

4x 6SL7GT + EL34 Matched Pair + GZ34/5AR4

Submit

JMX50 Spare Tube Set $255

4x 6SL7GT + EL34 Matched Pair

Submit

For all Octal-Plex Series amplifiers

The Octal-Plex Series is a family of guitar amps based on Marshall plexi circuits adapted for octal preamp tubes and executed with true point-to-point wiring. Modern features and a menu of circuit tweaks and customizable options make it easy for you to create your own signature amp.


The implementation of octal (8-pin) 6SL7GT preamp tubes in an amplifier built on classic plexi architecture results in an amazingly huge, powerful sound. True point-to-point wiring gives these amps a clarity beyond even an original plexi by creating a compact and direct signal path.


For the first time ever, you can experience the big sound of an octal preamp section and the clarity of true point-to-point construction in a plexi-style amplifier.

$500 Deposit

Balance due upon completion

Check in-stock availability

$500 Deposit

$500 Deposit

Balance due upon completion

Check in-stock availability

Balance due upon completion

Check in-stock availability

JMX50

JTX45 played by Val Gaina (Siren on the Moon)

Brad Gillis (Night Ranger, Ozzie Osbourne) playing through a JMX50

Also

available

from

JMX100

$3000.00

Based on the 100 watt monsters that rocked the world in the late ‘60s. Huge power and headroom. Aggressive crunch, singing leads, earth-shaking bottom. The ultimate balls-to-the-wall plexi rock machine.

Superlead circuit: 4x EL34 power tubes, silicon diode rectification, split V1 cathodes, smaller bright channel coupling cap, large bright cap, large mix resistors, later tone stack, bypassed V2a cathode, small PI coupling caps, less negative feedback, high B+ voltage, moderate B+ rail filtering.

Submit

$500 Deposit

Balance due upon completion

Check in-stock availability

JMX100 Spare Tube Set $325

4x 6SL7GT + EL34 Matched Quad

Submit
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BC Audio builds hand-made all-tube non-clone guitar amps. Recipient of Guitar Player's EDITORS' PICK AWARD and Premier Guitar's PREMIER GEAR AWARD. BC Audio was founded in 2009 by award-winning guitarist and tube amp master builder Bruce Clement, who has been wielding a soldering iron since the late 1970s. BC Audio products are proudly made in San Francisco, California, USA.

©2017 Bruce Clement, BC Audio, San Francisco. Other copyrights and trademarks are the property of their respective owners. Duh.

tel 415.310.3087

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