Armstrong Effects Dan Armstrong 'Yellow Humper' Effects Unit

The Yellow Humper is an equalizer for guitars, bass guitars, and keyboards.

They're back! The legendary Dan Armstrong Sound Modifiers are now available again and they're better than ever. These units are now 100% USA made and are hand-built to authentic 1975 Dan Armstrong specifications by Grafton Electronics.

Dan Armstrong Sound Modifiers are a range of simple, compact, and rugged accessories that can be used with any electrified instrument. They are designed to plug directly into the output of a guitar or bass guitar to give the player fingertip control of the sound, but they work just as well plugged into an electric keyboard or the output of any electronic accessory. Any musician, who wishes to use these units at the input of the amplifier, rather than at the instrument, need simply interchange two colour-coded wires inside the box.

All six units are built in a heavy duty aluminium casing, using only the finest quality components available. Overall dimensions are 59mm wide x 59m high x 70mm deep (including plug). The unit only protrudes 43mm from the face of the guitar. Weight is only 41/2 ozs, including battery.

Each unit has a specific effect or function, but several of them can easily be combined by plugging one into another to produce more complex effects. For recessed output jackplates (e.t.c Strat) adaptors are available to facilitate use.

All units come complete with a 9 volt battery already fitted, so all you need to do is plug in and play!

The Yellow Humper is rather similar to the Purple Peaker, but was designed specifically with bass guitarists in mind. With the Humper, the musician can select a single 7 db peak or hump in the frequency response centered at 100 Hz to give the instrument a very solid bottom range in the", 1 ", switch position. Selecting , ",2", , will produce the same low end peak plus a 10 db peak at 2000 Hz to enhance the overtones and presence. Like the Purple Peaker, the Yellow Humper improves the signal even in the ",Off' switch position due to its low 200 Output Impedance. The Yellow Humper was designed to let any bass. and many keyboards sound more powerful without be­,coming rumbly or thumpy. Like the Peaker, it is excellent for recording with. The Humper's input impedance is 100 k Ohms, and its Signal-to-Noise ratio is a very quiet 92 db.