Solar Guitars AC1.6FRFBB Sustainiac+

Solar Guitars AC1.6FRFBB Sustainiac+: Technical Review

The Solar Guitars AC1.6FRFBB Sustainiac+ pairs a 24-fret construction with a neck pickup system designed around Sustainiac operation and a Floyd Rose 1000 tremolo. Its listed price is 1319, with no currency specified in the supplied information. Availability is listed as September 2026. No customer reviews are available, so this assessment is based only on the published specifications and does not make claims about play feel, sound quality, setup, or reliability.

The guitar has an alder body with a flamed maple top, a maple set neck, and an ebony fingerboard. Its finish is described as Flame Trans Black Burst in high gloss, while the color listing gives Black Burst. Black hardware completes the stated appearance. These details establish the materials and finish, but they do not indicate the instrument's weight, body dimensions, or how the finish looks in person.

Neck and Playing Dimensions

The 648 mm scale length, equivalent to 25.5 inches, is a common full-scale electric guitar dimension. The neck has a C profile, measuring 20 mm thick at the first fret and 22 mm at the twelfth. Nut width is 43 mm, and the fingerboard radius is 350 mm, or 13.78 inches. Together, these measurements give a useful outline of the neck geometry, though they cannot establish how it will feel in a player's hands.

The ebony fingerboard carries 24 super jumbo stainless steel frets. The fret material and size are specified, but details such as fret-end finishing and factory setup are not. Luminlay dot inlays provide the position markers, and a Solar logo is placed at the twelfth fret. The listing does not state whether the inlays are side markers as well as face markers.

Pickup System and Controls

The pickup arrangement combines a Duncan Solar+ humbucker at the bridge with a Sustainiac Stealth Pro humbucker at the neck. The control set includes one volume knob with a push-pull function, one tone knob, a three-way switch, a Sustainiac on/off switch, and a Sustainiac mode switch. This gives the player dedicated switching for the Sustainiac system alongside pickup selection and the listed volume and tone controls.

The specifications do not explain the push-pull function or identify what each Sustainiac mode does, so those functions should be confirmed in the manufacturer's documentation before purchase. The pickup list also does not provide output measurements or switching diagrams. Buyers comparing the AC1.6FRFBB with a conventional two-pickup guitar should account for the additional Sustainiac controls and check that the control layout matches their preferences.

Tremolo and Tuning Hardware

A Floyd Rose 1000 tremolo is paired with a locking nut and Solar locking tuning machines with an 18:1 gear ratio. The locking components are relevant to the guitar's tremolo setup, while the listed gear ratio describes the tuning machines' mechanical ratio. No information is provided about factory adjustment, setup range, replacement parts, or the specific bridge configuration beyond the Floyd Rose 1000 designation.

The guitar is strung with Blacksmith.09,.46 strings. That gauge gives a reference for the supplied string set, but it does not establish the setup that will suit every tuning or playing style. Players planning to change string gauge or tuning may want a qualified setup, particularly with a locking tremolo system.

What the Specifications Confirm

• Construction: Alder body, flamed maple top, maple set neck, and ebony fingerboard.
• Neck dimensions: 648 mm scale, 43 mm nut width, 350 mm radius, and a C profile measuring 20 mm at the first fret and 22 mm at the twelfth.
• Hardware and electronics: Floyd Rose 1000 tremolo, locking nut, locking tuning machines, Duncan Solar+ bridge humbucker, and Sustainiac Stealth Pro neck humbucker.
• Included accessories: No bag or case is included, according to the supplied listing.

The AC1.6FRFBB Sustainiac+ is specified for players looking for a Solar guitar with a Sustainiac neck system, locking tremolo hardware, and a stainless steel fret set. Its published dimensions and component names make the configuration relatively clear, but important buying details remain unspecified, including weight, setup condition, exact push-pull function, and included documentation. With no customer feedback available, those points should be checked with the seller rather than inferred from the model's specifications.