Com­pact Am­pli­fier

SmartHouse - - CONTENTS - Writ­ten by Peter Fami­lari

We first spot­ted Marantz’s swish HD-AMP1 High Class com­pact am­pli­fier at the re­cent hi-fi show in Mel­bourne. It was hard to ig­nore its el­e­gant, un­der­stated clas­sic styling or its pre­ci­sion level of fit and fin­ish.

In its gor­geous and rather sump­tu­ous cham­pagne gold fin­ish it looked a treat and soon at­tracted a horde of ad­mir­ers.

Pow­ered up it filled the Marantz suite with mu­sic played back with be­liev­able tone qual­ity, scads of de­tail and plenty of dy­namic drive. A tes­ta­ment to the tech­nol­ogy idling away in that com­pact chas­sis.

Marantz de­vel­oped ad­vanced switch­ing am­pli­fier tech­nol­ogy for the HD-AMP. A tech­nol­ogy yield­ing a hefty 70 watts per chan­nel into speak­ers with a nom­i­nal 4-ohm load. The HDAM-SA2 mod­ules in­side the new amp are ac­cu­rate and have the abil­ity to give recorded mu­sic the feel and tex­ture of high-res­o­lu­tion au­dio.

To en­hance the lis­ten­ing ex­pe­ri­ence Marantz has given the HD-AMP1 its own unique Marantz Mu­si­cal Dig­i­tal Fil­ter­ing (MMDF). Users can choose from two dif­fer­ent fil­ter sig­na­tures to cater for dif­fer­ing tastes and mu­sic.

And with an eye to con­tem­po­rary trends Marantz has tweaked the amp’s dig­i­tal sec­tion to not only cater for CD qual­ity 44.1kHz/16 mu­sic res­o­lu­tion, but to also han­dle sig­nals of up to 384kHz/32 bit res­o­lu­tion and DSD 2.8Mhz/5.6Mhz/11.2Mhz.

The new amp car­ries both coax­ial and dig­i­tal in­puts that are tailor made to con­nect to TVs and set top boxes rout­ing their sound to be pro­cessed in­side the HD-AMP1’s ad­vanced dig­i­tal sec­tion.

Mu­sic stream­ing from say, a PC or Mac is made easy us­ing the amp’s USB-B port. Note­wor­thy is also the pro­vi­sion to con­nect iDe­vices us­ing the USB port handily lo­cated on the amp’s front fas­cia.

The HD-AMP1 has a high qual­ity head­phone stage built with a ded­i­cated am­pli­fier mod­ule called HDAM-SA2. This stage caters to a huge va­ri­ety of head­phones and the gain can be changed from low to mid to high depend­ing on the ef­fi­ciency of the head­phone plugged into the amp’s head­phone stage.

In keep­ing with its lux­ury styling and build qual­ity, the $2260 HD-AMP1 is housed in a dual-layer chas­sis bol­stered by a sturdy bot­tom plate to add strength and min­i­mize any ad­verse ef­fects of ex­ter­nal vi­bra­tion on sound qual­ity. Fi­nally the feet of the chas­sis have alu­minum die-cast in­su­la­tors to ab­sorb ex­ter­nal vi­bra­tion cre­ated by loud­speak­ers.

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