Wal Custom bass specifications

My Wal Mk I Custom Series bass with schedua facings

            Mk I body rear contouring

Laminated offset waist, twin cutaway body in three body styles - Mark I (21 fret 4 string), Mark II (24 fret 4 & 5 string), Mark III (24 fret 4, 5 & 6 string).  Mahogany core with exotic wood facings.  Maple, Amazonian hardwood and hornbeam laminated neck, 21 or 24 frets, rosewood or ebony fretted or fretless fingerboard.

Chrome or gold plated fittings (black anodised small tuning pegs as an option). 

Electronics and controls - Wal Custom Bass flyer

"ELECTRONIC FEATURES

WAL flat response, humbucking pick-ups; moulded in black ABS. with three point, spring mounted, height adjustment. These pick-ups contain four individual string- matched pick-ups, thus virtually eliminating imbalances, crosstalk and inter-modulation. Plated pole-pieces are adjustable with socket screwdriver provided.

WAL printed circuit electronic modules use high stability, closest tolerance components and graphite wiper pots, with push/pull gold contact switches. All controls are designed for ultra low noise, interference and distortion-free performance. Powered by a single 9-volt PP3 size battery, consumption is less than (1mA).

Balanced DI and transformer isolation provides clean, reliable and safe studio or stage mixer feed without the need for an external DI box.

Standard 1/4" jack output for amplifier feed. Insertion into this socket switches on electronics. A dummy or unconnected jack plug MUST be inserted when using DI output alone.

Pick-ups, P.C. Modules and output sockets are all interconnected via shake-proof, polarized connectors for easy removal and replacement. All cavities are screened against external electrical interference.

CONTROLS

Volume Knob:- rotary adjustment of output volume, pull to actuate pick-attack. A narrow band of high frequencies is added to the overall tone-setting to provide dynamic, percussive attack. Both overall output level and level of pick-attack are trimmable from inside the bass.

Pick-up Mixing Knob:- This silently mixes the levels of the pre-EQ'd pick-ups to any desired ratio whilst keeping the combined output level constant.

Tone-Knobs:- These operate electronic, low pass filters whose roll-off frequencies vary with the position of the control. Fully clockwise at 10, the spectrum is full and flat. As the controls are backed off, the spectrums of the appropriate pick-ups are foreshortened. (Roll-off 12dB / Octave). The dominant tone character varies, therefore, throughout the entire range of control. Pulling-up the knob produces a quasi-parametric boost of about 10dB to the harmonics which lie at or near the roll-off frequency set by the rotary position. This provides the characteristic active sounds so popular today, without the clinical quality common to many circuits. By using the pan mixer like a master tone control, in conjunction with the pick-up controls, an endless range of subtle tones and dynamic effects can be created, with or without the pick attack.

On left-hand models all rotary functions are reversed to right-hand."

 Original shape "Custom series" 4-string and 5-string headstocks

Mk I four-string bass and Mk II four and five-string basses

Mk III four, five and six-string basses

The "Standard" wood options
(left to right - American walnut, Wenge, Paduak, Schedua)

American Walnut (Juglans nigra  - also known as black walnut):  The heartwood is a light chocolate brown and varies from relatively plain to quite heavily figured (usually with swirling patterns rather than quilting or flaming).  Pete considers that this wood is the best choice for a fretless bass, giving the best fretless tone.

Wenge (Millettia Laurentii):  A very dark, dense wood, usually with a fine straight grain.  However some interestingly figured examples can be found.  Considered by many to give the hardest, punchiest of Wal tones. For an example of a more figured Wenge-faced Wal bass see picture on right.

Paduak (Pterocarpus soyauxii):  The heartwood of paduak is characteristically reddish in colour, varying to a dark, chocolate brown and usually with a straight grain.  The sap wood is very pale in colour and is sometimes used as a contrasting, book-matched centre stripe on Wals (see example above).

Schedua (Guibourtia Ehie):  In some ways the "standard" Wal wood, schedua (also written "shedua" and "hydua") is a rich golden brown colour.  The sapwood is a much paler colour and, as with paduak, is sometimes used to create a bookmatched central pale stripe on the facings.  However, the difference in colour between heartwood and sapwood is more subtle with schedua than paduak.  Schedua is also commonly known as "ovangkol" or "amazaque" and comes from the same botanical family as "bubinga".  Schedua often displays a unique form of flaming which can vary from fine and subtle patterns to the wild flame shapes shown above.

Some useful links to information resources on woods used in instrument building:

http://www.exotichardwoods-northamerica.com/index.htm

http://delta-intkey.com/wood/english/

http://www.bluebookinc.com/staticinfo/bluebookinc/PDF/AGuitar/AKnowYourWood.pdf