Maik Keller & Deeflexx

Maik Keller, bass player of the German Deep Purple Tribute Band “Demon’s Eye” already played together with Jon Lord and Ian Paice (Deep Purple). Maik plays a vintage Ampeg SVT stack with 8×10 cabinet. Throughout the last couple of years he tried various positions and setups on stages with varying dimensions.
His sound is slightly overdriven with corresponding higher frequencies – according to his bass-player idols Glenn Hughes und Roger Glover. Maik would like to hear the punch and precision of his sound beyond the sweet spot. Also he would like to reduce the overall volume on stage.

A bass players forum in the internet pointed Maik to the Deeflexx systems – and he started to reach his goals step by step…

“Firstly, I tried to play with 2 AURAs which I positioned in front of the upright cabinet. I immediately recognized improved higher frequencies standing in front of the cabinet but also moving sidewards. However, with increasing distance to the cabinet the volume of the beam from the upper 4 speakers also increased. This leads to an inconsistent bass sound along various positions on stage. Playing the bass still leads to an indirect playing experience missing the immediate tonal response.”

Several years ago, Maik toured together with Jon Lord and symphony orchestra playing the legendary “Concerto for Group and Orchestra”. Maik did not want to frighten the other musicians because of the dimensions of the bass cabinet and he intuitively turned the 8×10 cabinet on its side. This automatically led to a better punch and Maik was able to reduce the stage volume. However, now the higher frequencies were missing since the speakers were no longer in the scope of his ears. When I tilted the cabinet I lost the bass punch and so I had to increase again volume and bass of the amp – so this wasn’t really an improvement of my monitoring situation !

Rehearsals for the concerts “Concerto for Group and Orchestra” with Jon Lord and Demon’s Eye

“Secondly, I remembered how I turned the cabinet on its side during the gigs with Jon Lord and orchestra in those days and I started to experiment with the turned cabinet. This time I placed 2 Deeflexx systems in front of the center speakers. This already led to a good acoustical result which got even better when I added to additional AURAs in front of the remaining speakers.”

“I still remember the first two gigs which I played with the cabinet fully equipped with 4 Deeflexx systems. We played with Demon’s Eye at the Zeche in Bochum, and the next day at the Harmonie in Bonn. Both locations I know very well from numerous gigs. This time I experienced a new level of bass sound: During playing the bass I felt like being part of the sound. The sound I hear is a direct feedback of my interaction with the instrument.”


The bass sound is now also more comfortable for the other band members on stage. By now Maik plays the bass with the cabinet turned sidewards and with 4 Deeflexx systems in front of it for all his concerts.

“Today I can’t think about playing the bass without Deeflexx any more. If you are once used to the sound and feeling to play you’ll never accept anything less!

> Homepage DEMON’S EYE
> Facebook DEMON’S EYE













Maik Keller, bass player of the German Deep Purple Tribute Band “Demon’s Eye” already played together with Jon Lord and Ian Paice (Deep Purple). Maik plays a vintage Ampeg SVT stack with 8×10 cabinet.

Throughout the last couple of years he tried various positions and setups on stages with varying dimensions,

His sound is slightly overdriven with corresponding higher frequencies

- according to his bass-payer idols Glenn Hughes und Roger Glover.

Maik would like to hear the punch and precision of his sound beyond the sweet spot of his cabinet. Also he would like to reduce the overall volume on stage.

A bass players forum in the internet pointed Maik to the Deeflexx systems – and he started to reach his goals step by step…

“Firstly, I tried to play with 2 AURAs which I positioned in front of the upright cabinet. I immediately recognized improved higher frequencies standing in front of the cabinet but also moving sidewards. However, with increasing distance to the cabinet the volume of the beam from the upper 4 speakers also increased. This leads to an inconsistent bass sound along various positions on stage. Playing the bass still leads to an indirect playing experience missing the immediate tonal response.”

Several years ago, Maik toured together with Jon Lord and symphony orchestra playing the legendary “Concerto for Group and Orchestra”.

Maik did not want to frighten the other musicians because of the dimensions of the bass cabinet and he intuitively turned the 8×10 cabinet on its side. This automatically led to a better punch and Maik was able to reduce the stage volume. However, now the higher frequencies were missing since the speakers were no longer in the scope of his ears.

“Secondly, I remembered how I turned the cabinet on its side during the gigs with Jon Lord and orchestra in those days and I started to experiment with the turned cabinet. This time I placed 2 Deeflexx systems in front of the center speakers. This already led to a good acoustical result which got even better when I added to additional AURAs in front of the remaining speakers.”

“I still remember the first two gigs which I played with the cabinet fully equipped with 4 Deeflexx systems. We played with Demon’s Eye at the Zeche, Bochum, and the next day at the Harmonie, Bonn. Both locations I know very well from numerous gigs. This time I experienced a new level of bass sound: during playing the bass I felt like being part of the sound. The sound I hear is a direct feedback of my interaction with the instrument.”

The bass sound is now also more comfortable for the other band members on stage. By now Maik plays the bass with the cabinet turned sidewards and with 4 Deeflexx systems in front of it for all his concerts.

“I cannot think about playing the bass without Deeflex anymore. I feel extremely well on stage.”


Maik Keller, bass player of the German Deep Purple Tribute Band “Demon’s Eye” already played together with Jon Lord and Ian Paice (Deep Purple). Maik plays a vintage Ampeg SVT stack with 8×10 cabinet.

Throughout the last couple of years he tried various positions and setups on stages with varying dimensions,


His sound is slightly overdriven with corresponding higher frequencies

- according to his bass-payer idols Glenn Hughes und Roger Glover.

Maik would like to hear the punch and precision of his sound beyond the sweet spot of his cabinet. Also he would like to reduce the overall volume on stage.


A bass players forum in the internet pointed Maik to the Deeflexx systems – and he started to reach his goals step by step…


“Firstly, I tried to play with 2 AURAs which I positioned in front of the upright cabinet. I immediately recognized improved higher frequencies standing in front of the cabinet but also moving sidewards. However, with increasing distance to the cabinet the volume of the beam from the upper 4 speakers also increased. This leads to an inconsistent bass sound along various positions on stage. Playing the bass still leads to an indirect playing experience missing the immediate tonal response.”


Several years ago, Maik toured together with Jon Lord and symphony orchestra playing the legendary “Concerto for Group and Orchestra”.

Maik did not want to frighten the other musicians because of the dimensions of the bass cabinet and he intuitively turned the 8×10 cabinet on its side. This automatically led to a better punch and Maik was able to reduce the stage volume. However, now the higher frequencies were missing since the speakers were no longer in the scope of his ears.


“Secondly, I remembered how I turned the cabinet on its side during the gigs with Jon Lord and orchestra in those days and I started to experiment with the turned cabinet. This time I placed 2 Deeflexx systems in front of the center speakers. This already led to a good acoustical result which got even better when I added to additional AURAs in front of the remaining speakers.”


“I still remember the first two gigs which I played with the cabinet fully equipped with 4 Deeflexx systems. We played with Demon’s Eye at the Zeche, Bochum, and the next day at the Harmonie, Bonn. Both locations I know very well from numerous gigs. This time I experienced a new level of bass sound: during playing the bass I felt like being part of the sound. The sound I hear is a direct feedback of my interaction with the instrument.”


The bass sound is now also more comfortable for the other band members on stage. By now Maik plays the bass with the cabinet turned sidewards and with 4 Deeflexx systems in front of it for all his concerts.


“I cannot think about playing the bass without Deeflex anymore. I feel extremely well on stage.”


Deeflexx monitoring for 5 electric guitars

9 Deeflexx Systems were used to provide a perfect monitoring for 6 guitarists on stage …

› mehr

Microphone placement with Deeflexx at a concert

A constantly increasing number of guitarists and sound engineers use the Deeflexx for superb guitar sounds …

› mehr

Meeting with Aynsley Lister

AYNSLEY LISTER has invited me to meet and test the Deeflexx Systems for the first time – and it was a big surprise for him …

› mehr

Carl Verheyen – Deeflexx endorsement – Gitarre & Bass magazine

The today’s largest deeflexxed guitar rig is CARL VERHEYEN’s stage backline on the Mustang Run Tour …

› mehr