Delta V6 Docs

The Delta V6 Blues Harp Amplifier 
from Stage 5 Amps 

Congratulations for choosing the Delta V6 amp!  We know you will love it:  The Delta V6 has a full, crunchy, colorful tone very similar to the tweed amps of the 1950s.  It is one of the coolest sounds in all of blues music, a real vintage vibe.   Your amp is specifically tuned for blues harmonica, and it is suitable for practice, recording, or performing in any venue. 

The Delta V6 is a custom, vintage-style hand-built blues harmonica amplifier from Stage 5 Amps, designed for novice to pro players. The finished Delta V6 amp is supplied with a new Weber Vintage hand-made speaker, 6V6 power tubes and a 12AY7 or 6SL7 tube in the preamp section.   The amp is made in Denver Colorado by master amp tech Bruce Collins.  

The performance is pro-level all the way, but the price is modest.  The Delta V6 amp is a great tool for serious players.   It is gig- or studio-ready. 

Sorry, we no longer ship amps outside of the USA.  You may engage a trans-shipper/freight forwarder in the USA to re-ship to you.  Send us the shipper address and your contract number and we will ship to them.  We offer no warranty against shipping damage on any amp delivered outside the USA.


Save all the packing materials! 

Connect your harp microphone to the amp via the INPUT jacks on the top panel.  The jacks accepts a ¼-inch phone plug, like on a typical guitar cable.   Try both input jacks – High and Low – to see which works best with your microphone.  If your harp microphone is wired for low impedance it will have a different connector and you will need a converter.  I use the Audix T-50K converter and I recommend it, but there are many other good products out there. 

Switch the amp on and wait for the tubes to warm up.  This will take about 30 seconds.  Make sure the volume and tone controls are set low at first.  Increase the settings as needed after the amp is ready. 


Connect to an external speaker cabinet using a speaker cable that terminates with a ¼ inch phone plug.  This will switch off the speaker inside the amp.  The external speaker jack is clearly marked on the back of the amp. 


The Delta V6 amp has includes a line out feature that allows you to easily connect the amp to a PA sound system so you can be heard in any venue, no matter how large.  It sends a line level signal from the amp.  Use a regular instrument cable with ¼-inch phone plugs.  The line out jack is on the back of the amp next to the external speaker jack.  Plug the cable into a Mic or Line input on the PA mixer, or ask the sound tech at the gig to take care of it. 

I start with the settings on the mixer channel all “flat”, or straight up.  PA systems and speakers tend to sound bright, so I sometimes boost the lows and roll off the mids and highs in the mixer channel.  I recommend you send just a little of the signal to the monitors:  too much and it may cause feedback. 

You can also use the line out to connect the Delta V6 Amp to another amp.  Use an instrument cable from the line out jack on the Delta V6 amp to the input jack in the other amp.  You will hear the great Delta V6 tone and breakup in a bigger, more powerful amp when you need it. 


This is an awesome stage amp.  Great volume and tone in a small 24-pound package.  When practicing at home I usually dial the volume and tone to 3.  When gigging I sometimes use the line out and set the volume on 7 and adjust the tone to suit the room.  Your settings may vary a lot because of room acoustics and your personal tastes. 

The Delta V6 amp has a wonderful crunch when you attack with more than one reed.  Open your playing aperture a bit to allow adjacent reeds to play on a draw note, applying a slight bend.  Hit it a little harder on the attack and then quickly drop to normal pressure.  This is one way to get the crunch and color you hear in the example videos at our website.  This amp loves the overtones generated by multiple reeds! 


The fuse is located on the upper back of the amp near the power cord.  Use only a 2 amp slow blow fuse. 


The power of the amp is switchable from a full power to 8 watts.  Use the 8 watt setting to make the amp quieter for practice or smaller venues. 


All harp amps feed back at higher volumes.  Feedback has seldom been an issue with the Delta V6 amp.  If you are playing in a small room with reflective surfaces the amp may begin to feed back.  Reduce the volume and tone.  Try pointing the amp away from you.  Work on your mic cupping technique to isolate the mic from the sound of the amp.  Move to a larger space. 

If you are playing in a club and you hear feedback, try the solutions mentioned above and also consult the sound tech.  The most likely culprit is too much harp signal in the monitors. 


The Delta V6 amp comes with a limited warranty to the original purchaser only for the period of one year from the date of new shipment.  There is a 90 day limited warranty on tubes and speaker subject to approval.  Any modification to the amp or abuse will void the warranty.   Shipping for warranty is the responsibility of the buyer. 

Minor cosmetic imperfections in the tolex are normal and expected.   The Delta V6 Amps look great, as in the photos you see on the website.  Small variations do occur. 

DO NOT return the amp unless you have first obtained an RMA (Return Merchandise Authorization).    No exceptions!  You may contact us two ways: 

Call or text 530-408-6710 


-In the case of a return, shipping costs are not refundable. There will be a 15% restocking fee.
-Prices and specifications are subject to change at any time without prior notice. 
-With respect to our warranty policy, repair or replacement is at our discretion only.  

Thank you again for choosing the Delta V6 amp!  Please feel free to contact me with any comments or questions you may have.  I’ll be happy to help you get the most from this great harp amp. 

-Rick Davis, Stage 5 Amps 
Sheridan Wyoming USA

Model: Stage 5 Delta V6 

Speaker: 10" Weber Vintage hand-made speaker 

Rated Power: 18 or 15 watts depending on model, switchable to 8 watts 

Frequency Response: 74Hz ~ 8KHz 

Total Harmonic Distortion: 2% (clean sine wave input) 

Hum and Noise: 75dB below rated power 

Input Impedance, dual jacks: 1 Mega Ohm and 68K Hi-Lo 

Power Consumption: 50 watts maximum at 120v or 240v 

Amplifier Load Range: 8 ohms 

Preamplifier Section: 12AY7 or 6SL7 preamp tube 

Power Amplifier Section: 2x 6V6GT power tubes 

Dimensions: 16..75"w  x  8.75”d  x 16"h 

Weight: 24 lbs

Origin: Handmade in Denver Colorado, USA